Wood window restoration and repair is something that needs to be done about every 50 years. If you wait until your windows are in an emergency state of repair, you’re taking a risk and the task of wood window restoration will that much more involved.
Replacement window companies will often compare their product to a neglected historic wood window that has NOT been restored or maintained – an old wood window that would undoubtedly be drafty and inefficient.
Window companies will boast that their windows are Maintenance Free. That is true because Maintenance Free means Cannot be Maintained. Their replacement windows will be in the landfill in 20 years.
Wood window restoration and repair is easier than you think. Old wood windows were made to be repaired. They can easily be taken apart to insert new rails or muntins (cross pieces separating the panes). Broken parts can be remade or whole sashes can be duplicated. They can last 200+ years.
Rotted wood can be repaired to look like new with easy-to-use epoxy fillers designed for wood window restoration (see Abatron ad below). In many cases, these windows have been in service for over a hundred years with much of their deterioration resulting directly from a lack of maintenance.
With repairs and regular maintenance, the life of these old wood windows can be extended for an additional 200 years.
You are a steward to and old building with old windows. Please be responsible and Do NOT neglect your old windows.